1. Calderas of the San Juan volcanic field, southwestern Colorado;Steven;U.S. Geol. Surv. Prof. Paper,1976
2. Revised volcanic history of the San Juan, Uncompahgre, Silverton, and Lake City calderas in the western San Juan Mountains, Colorado;Lipman;J. Res. U.S. Geol. Surv.,1973
3. Paleomagnetism of the San Juan volcanic field, Colorado, U.S.A.;Tanaka;Rock Magn. Paleogeophys.,1973
4. Origin of NRM of San Juan volcanic rocks from Colorado, U.S.A.;Tanaka;Rock Magn. Paleogeophys.,1974
5. Palaeomagnetism and magnetic-polarity zonation in some Oligocene volcanic rocks of the San Juan Mountains, south-western Colorado;Diehl;Geophys. J.,1974